Feeding mechanism for straight-away and overseaming machines.



L. ONDBRDONK.

FEEDING MECHANISM FOR STRAIGHT AWAY AND OVBRSEAMING MACHINES.

APPLICATION FILED 11017.4, 1902.

3 SHEETS-SHEET 1.

Patented Dec. 1, 1914.

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L. ONDERDONK. FEEDING MECHANISM FOR STRAIGHT AWAY AND OVERSEAMINGMACHINES.

APPLICATION FILED NOV. 4, 1902.

Patented Dec. 1, 1914.

3 SHEETS-811E111 2 Qvi Imam THE NORRIS PETERS c0. PHOTO-LITHO.,WASHINGTON, o c

L. ONDBRDONK.

FEEDING MECHANISM FOR STRAIGHT AWAY AND OVERSEAMING MACHINES.

APPLICATION FILED NOV. 4, 1902 Patented Dec. 1, 1914.

3 SHEETfi SHEET 3.

Suvanfoz GU01 "my YHE NORRIS PETERS ca, PHoro LITHO WASHING ran 0 cUNITED STATES "PATENT OFFICE.

LANSING ONDERDONK, OF NEW YORK, N. Y., ASSIGNOR 'IO UNION SPECIALMACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FEEDING MECHANISM FOR, STRAIGHT-A1VAY AND OVERSEAMING MACHINES.

Application filed. November 4, 1902.

To all whom it may concern Be it known that I, LANSING ONDERDONK, acitizen of the United States, residing at New York, in the county of NewYork, State of New York, have invented certain new and usefulln'iproven'icnts in Feeding li'iechanism for Straightiway and Over--seaming Machines, of which the following is a description, referencebeing had to the accompanying drawing, and to the letters and figures ofreference marked thereon.

My invention relates to certain improvements in sewing machines, and hasfor its principal object an improvement in machines capable of formingboth straight away and Zig zag or overedge stitches, in which thecharacter of the stitch may be changed at the will of the operator. Amachine of this type is shown in an application filed by Russel G.lVoodward on the 13th day of June, 1901, Serial No. 61,396, patentedFeb. 23, 1904, Number 753,187 and in another application filed by thesaid Voodward on December 3, 1902, Serial No. 133,731 patented June 9th,1908, No. 890,582. In the machines illustrated in said applica' tions,which are designed principally for use in connection with what is knowntechnically as the closing of shoes, means are provided, under thecontrol of the operator, for shifting from straightaway to zig zagsewing, at will. As heretofore constructed, however, such machines havenot embodied any mechanism for changing the amount of throw of the feeddog of the machine, hence the distance between the needle punctures uponeach side of the line of the zig zag seam is twice as great as betweenthe needle punctures in straight-away sewing.

The object of the present invention is to provide means forautomatically shifting the throw of the feeding mechanism as thecharacter of stitch is changed, so as to preserve at all timesregularity in the length of the stitches.

The invention is illustrated in the accompanying drawings, in which,

Figure l is a side elevation of so much of a sewing machine of the typereferred to, as is necessary to a complete understanding of theinvention, the cloth plate being removed; Fig. 2 is a cross section ofthe machine showing the parts when the foot lever is in normal positionand the machine is adapted to sew straight away stitches; Fig.

Specification of Letters Patent.

Patented Dec. 1, 1914.

Serial No. 130,038.

3 is an end view, partly in section, with the cloth plate removed; Fig.4 is a detail view of another and preferred form of the connectionbetween the stitch-shifting mecha nism and the feed dog shiftingarrangement; Fig. 5 is a view showing more or less diagrammatically ashoe upper stitched on my improved machine.

In these drawings, A represents the base of the machine, from whichrises an arm a, carrying at its head the usual parts of the machine,such as the presser bar, which it is not deemed necessary to hereinillustrate.

B represents the main shaft, 0 the needle lever, journaled on the studc, and D the needle bar, these parts being of usual construction andoperated in the customary manner.

E represents the cloth plate, under which are the looper and feedmechanisms usually existent in machines of this type, and all operatedfrom the main shaft B in the usual manner. On said shaft B is secured apinion F, the teeth of which intermesh with those of the gear wheel F,mounted to turn free v on a stud shaft f, secured in the arm a. Theouter end of the shaft is provided with an enlarged circular head f,forming a guide and support for an eccentric or cam f secured to androtating with the gear wheel F. The eccentric or cam f is of the shapeshown and rotates between and in working contact with the two arms 9 gof a frame G hung on a pivot stud 9 carried by the arm or standard a,the movements of the eccentric being transmitted to said arms, andeffecting an oscillating movement thereof. To the frame Gr is secured byscrews z', a segment I having a curved slot 1 therein, the center ofwhich is at times slightly eccentric to the center of a pivot pin j,carried by the lower end of an arm J, depending from and rigidly securedto the rock shaft J, from which movement is imparted to the swingingneedle bar gate or frame, by the usual connections.

K represents a bar or link having on its outer end a head embracing astud 3, which is adjustable up and down in the curved slot 1, to varythe amount of throw of the rock shaft J. This bar or link K has alongitudinal slot 5, through which passes the pivot pin j, the other endof said bar or link K having pivoted thereto on the pin T, a. pivotedframe 8, which has at its forward end slotted side forks 9, embracingthe pivot pin on the arm J \Vhen these forks embrace the pivot pin j,the swinging of the segment 1 imparts oscillation to the rock shaft J.Projecting downwardly from this pivoted frame 8 is a plate or lug 10,having on its lower end a pin 11 adapted to lit in a curved slot 6 on aplate 12, screwed to the plate 11, which is pivoted upon a stud 15,secured to a bracket on the machine frame. The plate 14, and the plate12 are recessed as at 0', so that when thrown in their upward positionthey engage the pivot pin j on the rock shaft arm J, and thus hold therock shaft from oscillation when the pivoted frame 8 is out ofengagement therewith. The pivoted frame 8 is normally spring pressedupwardly by means of the spring 16 seated in the yoke 17, which at itsupper end bears upon the under side of the bar K. The plate ll ispivoted at 19 to the link 20 pivoted at its lower end on the verticallysliding part 21, having on its inner side the projection 22, whichcooperates with a projection 23 on the frame G, and prevents movement ofthe part 22, except when the cam or eccentric f is in a certainposition, this being timed so that the cam will only assume thisposition as the needle is just about to enter the goods in its descent.

The plate 14 has a rearward projection 03 connected to the lever 25,which is pivoted to a bracket 26 on the machine frame in suitableoperative connection with a treadle. This lever is normally held withits outer end in the extreme upper position, leaving the plates 12 and14 in engagement with the pivotpin j, and the pivoted frame 8 and link 7disengaged from said pin, so that the machine will sew straight away,but when the lever 25 is pulled downwardly, then the parts are shiftedto cause the pivoted frame 8 to engage the pivot pin j, and thenoscillatory movement will be imparted to the rock shaft, and, therefore,the zig zag movement to the needle.

Up to this point the machine described forms the subject matter of theaforesaid patent of R. G. \Voodward, No. 890,582, and I will now proceedto describe the apparatus forming the subject matter of my inventionwhich relates to the mechanism for automatically changing the length ofstitching when the shift is made from straight-away to zig zagstitching, and vice versa.

The feed rocker 100, the feed dog carrying bar 101, the cam 102, forraising and lowering the feed clog 103, the disk 101 with the axiallymovable pin 105, for transmitting forward and backward movement to thefeed dog, and regulating the length of the stitch, are. all similar tothe ordinary Union Special sewing machine feeding mechanism, such asillustrated in Patent 299,568.

Upon the outer end of the lower shaft 106 of the feed rocker is fixed acurved slotted segment 107, in the slot 108 of which is adapted to beadjusted a pin or stud 109, embraced by one end of the rod 110, which isattached at the other end to the radially movable crank pin 105.

livoted to the outer end of the pin or stud 109, is one end of a link111, which at its lower end is pivoted to the end of the crank 112, atits opposite end fixedly sleeved to the rock shaft 113, extendinglongitudi nally of the bed plate of the machine, its rear end being soconnected as to be rocked back and forth by the stitch-shiftingmechanism.

As shown in Figs 1 and 3, this shaft 113 has an upwardly extending crank11%, to which is connected a link 115, attached at its opposite end to alever, pivoted to a post 117, on the machine frame; the other arm 116 ofsaid lever has pivotal connection with the lever or link 118, which atits opposite end is pivoted to the upright link or arm 119, connected tothe lever By this connection, it will be noticed that when the parts areproperly timed, when the lever is shifted, the stud 109 will be shiftedin the slot 108, thus varying the throw of the feed rocker and,therefore, that of the feed dog. \Vhen the lever 25 is up and themachine is sewing straight away stitching, the stud 109 is in the lowerpart of the slot 108, and the feed is of normal length; when the shiftto zig zag stitching is made the stud rises to the top of the slot, andthe stroke of the feed dog is lessened.

In Fig. 4-, the rock shaft 113, is not connected in the manner shown inthe other figures. to the lever 25, but is connected to thereciprocating slide 21, in the manner shown, this doing away with theconnections 118 and 119, the connection to the lever 25 being throughthe parts of the shifting mechanism.

In Fig. 5 of the drawings, I have shown a shoe upper indicated at Swhich is stitched on my improved machine. The line of stitching joiningthe parts of the upper consists of a straight line of stitching i. and azig-zag or over edge line of stitching S The lines of stitching S and Sare joined so that one follows into the other. In shifting from thestraight line of stitching to the xig-zag line of stitching, the lengthof the feed stroke is varied so that the distance between the adjacentneedle punctures in the over seaming stitches which are in line with theneedle punctures in the straight-away stitches is made the same as thedistance between the needle punctures in the straightaway stitches. Thatis to say, the distance between the needle punctures s and s in thestraight line of stitching S is the same as the distance between theneedle punctures s and s in the over seaming line of stitching S While,as above stated, the invention has been devised principally for use inchanging the length of stitch as the character of stitch changes fromzig zag to straight away and vice versa, still as I believe I am thefirst to provide means, under the control of the 0pcrator, whereby achange in the length of stitch is automatically effected by the movementof a lever within reach of the operator, and to provide means wherebysuch change can only take place at a predetermined point, mechanismbeing provided for preventing the change except at such point, I wish toclaim these features broadly.

Various minor modifications and changes in the construction of the partsof the device, may be made without departing from the spirit of theinvention.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. In a sewing machine, stitch-forming mechanism including means forforming straight-away and means for forming overs aming stitches, and inwhich the line of straight-away stitching and one edge of the line ofoverseaming stitching are in a continuous straight line, means under thecontrol of the operator for shifting from one style of stitching to theother, feeding mecha nism and mechanism for automatically lessening thethrow of the feeding mechanism when the change from straight-away tooverseaming stitching takes place and cause the distance betweenconsecutive needle punctures along the edge of the seam to remainconstant; substantially as described.

2. In a sewing machine, stitch forming mechanism including means forforming straight-away and means for forming overseaming stitches, and inwhich the line of straight-away stitching and one edge of the line ofover-seaming stitching are in a continuous straight line, means underthe control of the operator for shifting from one style of stitching tothe other, feeding mechanism. and mechanism for automatically lesseningthe throw of the feeding mechanism when the change from straightaway tooverseaming stitching takes place and cause the distance betweenconsecutive needle punctures along the edge of the seam to remainconstant; and means for preventing the shift except while the needle isabove the goods; substantially as described.

In a sewing machine, stitch-forming mechanism including means forforming straight-away stitches, and means for forming overseamingstitches, and in which the line of straight-away stitching and one edgeof the line of overseaming stitching are in a continuous straight line,means under the control of the operator for shifting from one style ofstitching to the other, feeding mechanism and mechanism forautomatically lessening the throw of the feeding mechanism when thechange from straightaway to overseaming stitching takes place and causethe distance between consecutive needle punctures along the edge of theseam to remain constant, said means including a lever adapted to throwinto operation mechanism to accomplish the shift; substantially asdescribed.

l. In a sewing machine, stitch-forming mechanism including means forforming straight-away stitches, and means for forming overseamingstitches, and in which the line of straight-away stitching and one edgeof the line of overseaming stitching are in a continuous straight line,means under the control of the operator for shifting from one style ofstitching to the other, feeding mechanism and mechanism forautomatically lessening the throw of the feeding mechanism when thechange from straight-away to overseaming stitching takes place and causethe distance between consecutive needle punctures along the edge of theseam to remain constant, and a stop mechanism to prevent the shiftexcept while the needle is above the goods; substantially as described.

In a sewing machine having means for forming straight away oroverseaming stitching and means for shifting from one style of stitchingto the other, a feeding device including a feed rocker, connectionsbetween the driving shaft and the feed rocker, and devices for adjustingthe throw of the feed rocker, including a slotted segment on the feedrocker, and a pivot pin movable therein, and a crank and shaftconnection between the pivot pin and the shifting mechanism;substantially as described.

6. A sewing machine including in combination means for formingstraightaway stitches including a needle, means for vibrating saidneedle laterally at alternate stitches to form overseaming stitches,means for shifting from one style of stitching to the other, including alever under the control of the operator, a. feeding device including afeed rocker, connections between the driving shaft and said feed rocker,and means for adjusting the throw of the feed rocker comprisingconnections with the said lever whereby the throw of the feeding devicemay be controlled at the will of the operator and while the machine isin operation and the distance between the needle punctures in theoverseaming stitches which are in line with the needle punctures in thestraight-away stitches, is made the same as the distance between theneedle punctures in the straight-away stitches.

T. A sewing machine including in combination. means for formingstraightaway stitches including a needle, means for vibrating saidneedle laterally at alternate stitches to form overseaming stitches,means for shifting from one style of stitching to the other, including alever under the control of the operator, a feeding device including afeed rocker, connections between the driv ing shaft and said feedrocker, and means for adjusting the throw of the feed rocker comprisingconnections with the said lever, whereby the throw of the feeding devicemay be controlled at the will of the operator and while the machine isin operation, and simultaneously with the shifting from one style ofstitching to the other; substantially as described.

8. A sewing machine including in combination means for formingstraight-away stitches including a needle, means for vibrating saidneedle laterally at alternate stitches to form overseaming stitches,means for shifting from one style of stitching to the other, including alever under the control of the operator, a feeding device, and meansoperated by said lever for controlling said feeding mechanism, wherebythe distance between the adjacent needle punctures in the overseamingstitches Which are in line with the needle punctures of the straightawaystitches, is made the same as the distance between the needle puncturesin the straightaway stitches.

In a sewing machine, a feeding device including a feed rocker,connections between the drive shaft and the feed rocker, a lever, underthe control of the operator, connections between said lever and the feedrocker for adjusting the throw of the latter at the will of theoperator, while the machine is in operation, and a stop for preventingsaid adjustment except at a predetermined point.

In testimony whereof I aflix my signature, in presence of two witnesses.

LANSING ONDERDONK.

\Vitnesses P. F. VVALsH, J. H. HOWELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

